Belief in natural objects having souls?

It is all according as to what you mean by natural objects. If you mean say a Vase, then no, a vase does not have a soul, it is not a living thing. But it does have intelligence. Everything on this earth has intelligence from the atom to the highest moutain. For at a command from God all may be moved from their place. As all matter has to obey a law, all are subject to God who has the greatest intelligence and therefore is the higher law to which all must give obedience to.
Only that which lives has a soul, and the soul is the body and the spirit combined.